/*
 * Copyright 2012 Gregor Schauer
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package at.schauer.gregor.vienna.validator;

import java.util.ArrayList;
import java.util.Collection;

/**
 * @author Gregor Schauer
 */
public class ChainValidator<O> implements Validator<O> {
	protected Collection<Validator<O>> validators;

	public ChainValidator() {
		this(new ArrayList<Validator<O>>());
	}

	public ChainValidator(Collection<Validator<O>> validators) {
		this.validators = validators;
	}

	@Override
	public O validateObject(O obj) {
		for (Validator<O> validator : validators) {
			obj = validator.validateObject(obj);
		}
		return obj;
	}

	@Override
	public String validateString(String obj) {
		for (Validator<? extends O> validator : validators) {
			obj = validator.validateString(obj);
		}
		return obj;
	}

	public boolean add(Validator<O> validator) {
		return validators.add(validator);
	}
}
